importing old kmail emails

Greetings all;

I just installed Mint-17.1 LTS, then after looking at T-Bird and finding 
the only account it would let me use was a captive account, apparently 
owned by the moz people, a situation that has zero chance of happening 
here as I rather enjoy my privacy.  So I installed enough kmail to get it 
to run.

Of course there are no accounts or folders.  The accounts for rx are 
simple, scan and retrieve new mail placed in /var/spool/mail by the 
mailfilter/fetchmail/procmail/spamassassin/clamav checks.  That has not 
been setup yet, and ATM I am back booted to a 10.04.4 LTS install in order 
to send this.

Send accounts I can setup in a minute or so each once I retrieve the 
configs by screenshots of the old 1.13.5 setups. It will take more time to 
print them than to retype them into the account creator.

But, I would much rather use its import function to go get about 25Gb of 
old mail from the previous installations drive, now mounted at 
/media/ubuslash.  But there appears to be no way to tell this new kmail 
that its there.

Its 99.9% maildir format and getting so bulky in 3 of the nearly 50 
folders that 1.13.5 was getting boringly slow.

Sure, I can copy them over with something like mc, but if I import. that 
should try to fix any huge diffs in how it does access this rather large 
corpus of email, some of which goes back to 2002.

So how do I go about this importation, which I fully expect to take a few 
hours?

Thanks all.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
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